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ThinkPad X220 CPU Throttling

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Uploaded on Jul 25, 2011

Extreme CPU throttling in Lenovo ThinkPad X220 running on the standard 65W AC Adapter with a fully charged 9-cell battery installed. System was under normal (not synthetic) heavy compute load on all 4 threads on both cores, but without any significant GPU load. Note how Core Speed jumps back and forth between 800 MHz and 3200 MHz.

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